Suppose 128 mL of 0.429 M MgCl2 is mixed with 142 mL of 0.279 M NaOH and allowed to react completely. Volume change at precipitation can be ignored. How many grams of Mg(OH)2 will form? What is the molar concentration of Mg2+ in solution? What is the molar concentration of Cl- in solution? What is the molar concentration of Na+ in solution? What is the molar concentration of OH- in solution?